Merging upstream version 1.71.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+# iana-time-zone - get the IANA time zone for the current system
+
+[![Crates.io](https://img.shields.io/crates/v/iana-time-zone.svg)](https://crates.io/crates/iana-time-zone)
+[![Documentation](https://docs.rs/iana-time-zone/badge.svg)](https://docs.rs/iana-time-zone/)
+[![Crate License](https://img.shields.io/crates/l/iana-time-zone.svg)](https://crates.io/crates/iana-time-zone)
+[![build](https://github.com/strawlab/iana-time-zone/workflows/build/badge.svg?branch=main)](https://github.com/strawlab/iana-time-zone/actions?query=branch%3Amain)
+
+This small utility crate gets the IANA time zone for the current system.
+This is also known the [tz database](https://en.wikipedia.org/wiki/Tz_database),
+tzdata, the zoneinfo database, and the Olson database.
+
+Example:
+
+```rust
+// Get the current time zone as a string.
+let tz_str = iana_time_zone::get_timezone()?;
+println!("The current time zone is: {}", tz_str);
+```
+
+You can test this is working on your platform with:
+
+```
+cargo run --example get_timezone
+```
+
+## Minimum supported rust version policy
+
+This crate has a minimum supported rust version (MSRV) of 1.48
+for [Tier 1](https://doc.rust-lang.org/1.63.0/rustc/platform-support.html) platforms.
+
+Updates to the MSRV are sometimes necessary due to the MSRV of dependencies. MSRV updates will
+not be indicated as a breaking change to the semver version.
+
+## License
+
+Licensed under either of
+
+* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
+  <http://www.apache.org/licenses/LICENSE-2.0>)
+* MIT license ([LICENSE-MIT](LICENSE-MIT) or
+  <http://opensource.org/licenses/MIT>)
+
+at your option.
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.